Insulating-machine.



Patented July 9, l90l'. V. BOYLE.

INSULATING MACHINE.

(No Model.)

Invenior:

ll iinessas:

Way/L UNITED STATES PATENT OFFICE.

VERNON BOYLE, OF PATERSON, NEW JERSEY.

INSULATING-MACHINE.

SPECIFICATION formingpart of Letters Patent No. 678,039, dated July 9,1901. Application filed March 15, 1901. Serial No. 51,247. (No model.)

To all whom it may concern:

Be it known that I, VERNON BOYLE, a citizen of the United States, and aresident of Paterson, in the county of Passaic and State of New Jersey,have invented certain new and useful Improvements inInsulating-Machines, of which the following is a specification.

My invention relates to an insulating-machine, with the object in viewof providing simple and eifective means for preventing the insulatingcompound from injuriously binding the stock worm to the central tube,through which the wire to be insulated is conducted tothe core and die.

In the accompanying drawings, Figure 1 is a view in verticallongitudinal section of so much of an insulating-machine as will sufficeto show a practical embodiment of my invention; and Fig. 2 is anenlarged view in detail, partly in section, showing the structure at thejoint between the stock-worm and corebridge.

The general type ofmachine to which my present invention is directed isthat shown, described, and claimed in Letters Patent No. 592,938,granted to me November 2, 1897-.

The cylinder within which the stock-worm operates is denoted by a and isprovided on its interior with a series of annular recesses 12 b, &c.,which become annular chambers vwhen closed along their interior faces bya tubular bushing c, which forms a bearing for the stock-worm d. Theannular chambers b b intercommunicate with one another, and the coolingfluid is admitted to them through a passage-way e, which enters oppositean intermediate annular chamber and flows thence into the annularchamber at the rear and thence toward the forward end of the stockworm,thereby serving to cool the stock-worm throughout its entire length. Thestockworm is keyed to a breech-block f, which has a thrust-bearing in ablock g, as is usual. The-corebridge is denoted by h and is held inposition by means of a nut t', engaged with the supporting-piece j, thedie It being adjustably secured in a supporting-piece l, the latterbeing locked in position by means of a nut m and adjusting-screwsn.

My present invention is directed more particularly to the structure ofthe core-bridge and the parts which coact therewith to form a tightclosure at the joint between the stock- Worm and core-bridge to preventas far as possible the insulating compound from working into positionbetween the stock-worm and central tube, and to further provide in casethe material does work to any considerable extent into said positionbetween the stockworm and central tube, so as to produce a seriousbinding eifect, means whereby this fact may be readily detected beforethe parts have become seriously impaired.

The core-bridge (denoted, as aforesaid, by h) has the rear end of itshub projected, as shown at 0, within the forward end of the stock-worm,the inner end 19 of said extenof the central tube t and the interior ofthe Worm there is a tube 20, having its forward end thickened, as at w,and engaged with the packing r and its rearengaged with a tailscrew ,1,having a screw-threaded engagement with the interior of the breech-blockf and provided with a jam-nut z for holding the tail-screw in position.The tube to is keyed to the stock-worm to rotate therewithas, forexample, by the well-known featherand-groove connection-so that it mayhave at the same time a limited longitudinal movement independent of theworm and central tube for the purpose of forcing the packing 1' againstthe shoulder g on the hub to close the joint tightly between thestock-worm and core-bridge.

In operation when any considerable amount of material works past thepacking and into the space between the tube to and central tube 15 itwill cause the latter to turn, together with the worm, in a direction tounscrew the tube 6 from the hub of the core-bridge, and this beingobserved by the operator the machine may be stopped, the tube t removed,and the interior of the tube w cleaned, and, if necessary, the jointbetween the stock-worm Ice tween the tube 15 and the core-bridge thatthe tube 15 shall unscrew when caused to rotate in the direction whichthe stock-worm rotates to force the insulating compound forward aroundthe core.

It is evident that changes might be resorted to in the structure, form,and arrangement of the several parts without departing from the spiritand scope of my invention. Hence I do not wish to limit myself strictlyto the structure herein shown and described; but

What I claim isl. The combination with the stock-worm and its support,of a core-bridge and its sup port, the said core-bridge being providedwith a hub extension projecting within the forward end of the stock-wormand means for packing the joint between the stock-worm and core-bridge,substantially as set forth.

2. The combination with the stock-Worm, core-bridge and their supports,of a central tube having a screwthreaded engagement; with thecore-bridge, the said screw-threaded connection between the central tubeand corebridge being such that the said central tube will unscrew whenrotated in the direction in which the stock-worm rotates to force thestock forward, substantially as set forth.

3. The combination with the stock-worm and its support, of a core-bridgeand its support, the hub of the core-bridge being provided with aright-hand screw-thread Within its end adjacent to the stock-worm, acentral tube having a screw-threaded engagement with said right-handscrew-thread and means for packing the joint between the stock-Worm andcore-bridge, substantially as set forth.

4:. The combination with the stock-worm, core-bridge and their supports,the core-bridge being provided with a right hand screwthread in its hubadjacent to the stock-worm, of a rotary part extending within thestockworm and engaged with the said right-hand screw-thread fordetecting the escape of the insulating compound through the jointbetween the stock-worm and core-bridge, substantially as set forth.

5. The combination with the stock-worm, and its support, of acore-bridge and its support, the core-bridge being provided with ashouldered hub extension projecting within the stock-worm, a packingengaged with the shouldered projection, a central tube engaged with saidprojection, a tube intermediate of the stock-worm and central tube andengaged with the packing and means for exerting pressure upon saidintermediate tube to adjust the packing, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 27th day of February, 1901.

, VERNON BOYLE.-

Witnesses 5 FREDK. HAYNES, HENRY THIEME.

